In a quiet state, the normal blood pressure for a 65 year old is between 90 and 139 mmHg systolic and between 60 and 89 mmHg diastolic. The lateral pressure on the walls of the blood vessels as the blood flows through them is the blood pressure. It can be measured with devices such as electronic sphygmomanometers and mercury column sphygmomanometers. Blood pressure pushes the blood and maintains blood circulation for normal physiological activities of the body. When the blood pressure of 65-year-old people is low, it may affect the blood supply of the heart, brain, kidneys and other organs, and symptoms such as dizziness, fatigue, oliguria and panic may occur; elevated blood pressure may lead to spasm or rupture of blood vessels, and diseases such as cerebral hemorrhage, cerebral infarction, hypertensive heart disease, hypertensive nephropathy and so on may occur. Therefore, 65-year-olds should keep their blood pressure normal. If abnormal, need to go to the hospital for further examination of blood lipids, cranial CT, electrocardiogram, renal function and other items to find the cause, under the guidance of the doctor to take medication.